Typographical printing machine



Nov. 13, 1928.

P. A. C. DUWOOS TYPOGRAPHICAL PRINTING MACHINE Filed Aug. 5, 1926 2 Sheets-Sneet Nov. 13, 1928.

P. A. c. DUWOOS TYPOGRAPHICAL PRINTING MACHINE Filed Aug. 5, 1926 2 SheetsSheet 2 @0129 "c/n/eg Patented Nov. 13, 1928. Y

J UNITED STATES 1,691,383 PATENT OFFICE.

PAUL ANDRE'CAMILLE D'UXVOOS, 0F ROUEN, FRANCE.

TYPOGRAPHICAL PRINTING MACHINE.

Application filed August 5 1926, Serial No. 127,456, and in France August 8, 1925.

My present invention relates to typographical printing machines and has for its ob ject to provide a platen printing machine of this type, characterized by a continuously n'ioving inking devicewhich is completely 1ndependent from the chase or form carrying platen.

Said tacting formly inking device comprises paste conrollers carried by aroller chain unimoved around the platen, said contacting rollers being charged with ink as they are moved over a suitably arranged bed plate and then inking the form secured beneath the platen.

The platen is completely independent from the inking device, which is carried by the frame of the machine. In order to allow the contact rollers to ink the form, the platen will be stopped at the top of its stroke for a time necessary for the passage of the rollers. This result will be obtained by actuating the platen by means of a particular mechanism having two connecting rods.

In the accompanying drawings:

Fig. 1 is afront elevation of the complete machine.

Fig. 2 is a corresponding side elevation.

Fig. 3 is a longitudinal section of the upper part of the machine, showing the inking mechanism.

Fig. 4t is one half of the transverse section of the same part.

' The two last views have been simplified to facilitate comprehension thereof.

Fig. 5 is a detail view of the ratchet mechanism.

6 tween the roller and cam mechanism.

In the present arrangement of the machine, the platen A carries the form B at its lower part. Said form may be either a form with movable types or better a typographi cal block. The same is slidably arranged in guide-ways C in the frame and actuated by two connecting-rods D and E, to which movements are imparted by a crank-disc F and a cam G respectively. and the upper ends of which are pivotally connected to the ends of a pivoted or fulcrumed cross-bar I-I, pivoted around the pin I on the platen. The disc F and cam G are rotated in opposite directions, the one with half the speed of the other, and their respective radii are determined so as to impart to the platen reciprocating movement with a slackening equivalent to a stopis a detail View of the connection be ping during about one quarter of the period near the upper dead centre.

The printing will be elfectedon a stationary slab J, where a movable hand-guard K SUPPOITS the usualparts.

The form or block B will be inked prior to each printing by one of the two sets of contact-rollers L'L. Said sets each comprise two rollers covered with typographical V form by rails Q, urged by adjustable tension springs and the contact with the block or form will be adjusted by contact-guides R on which rest the pulleys of the rollers. Said rails Q and R are carried by the platen and secure to thepath of the contact or inking rollers an invariable position With relation to the block or form during'the whole period. of inking.

The chains N will be moved by the sprocket wheels 0 loosely arranged on a shaft V and each of which is made integral with a pinion U meshing with a pinion T keyed on a shaft In order to have a perfect synchronism of movement for both chains the guide pinions P are keyed on the same shaft X.

The contact rollers will be charged with ink as they pass over a cylindrical table Y keyed on the shaft V and receiving a uniform movement in a direction opposite to that of the chains. Such movement will be imparted to it by the shaft S and the set of pinions a, Z), 0.

An ink pot with a yielding blade d is ar; ranged in the machine between the chains, the feed-roller e is actuated thereby through the agency of a ratchet and a lever f actuated by a cam 9 formed at one end of the table Y.

A take-off roller li carried by two levers keyed on an axle will be reciprocated bet-ween the ink-pot and table by a cam 7' formed on the opposite end of the table. Said roller covered with paste will be charged with ink as it comes into contact with the feed roller and it will deposit such ink upon the table.

The ink deposited in this way will be brought owing to therotation of the table on an equalizing roller is covered with paste. Said roller which is freely held by two levers keyed on the shaft Z and resting on the distributing roller m, will be moved with the rotating table which will impart a rotary movement to the roller m around its axis Z. The roller m will moreover reciprocate parallel to its axis by the action of a conventional device with two screws having crossing threads.

Thus the ink will be suitably distributed and equalized on the entire width of the table before the freshly inked Zone will come into contact with the contact rollers. A lever n attached to the end of the shaft Z enables the pressure of the roller A: on the table to be easily adjusted. I Thus the complete inking mechanism is entirely independent from the platen andmerely supported by the fran'ie members of the machine. T single shaft S actuatedin turn by asilent chain with central guide Z actuated bythe crank-disk F.

'In thev printing machine thus constructed the only important reciprocating parts are the platen and connecting rods; the weight thereof mayb reduced to a zminin' um eon 1,

patible withjthe condition of resistance and thus higlispeedsamaybe obtained without excessive strain on the'pa'rts,

' The contin'i' ous' D'IQVQIDBnt of the contactrollers is also favourable to obtain such high izingancl distributing rollers aswell as the inking table may be arranged nfd flerent I ways, the number sa1dparts mayhe var ed speed, 'atthe' sainetime securing perfect ink-l ing in spite of the very high speed at thepassage over the form. v

The machine will be suitablefor printing on spooled paper and card with 'theaddition of an apparatus intended tofeed thelatter after each printing. Thesame maybe par} ticularly" coupled witha machine working such printed strip of paper and manufacturing label's, boxes and other similar articles.

The machine may also be provided with a device enabling sheets of paper tobe printed with automatic n'iargining. V

I wish it to be understood th ati'hammerelydescri'bed' an example of the improved mechanisn'i. Particularly the platen m'y reccire d fferent movements nonparallcl, and particularly atlaptedtob'e opened like a port:

folio; the same may be arranged below the st'one and carry the block orfo'rm at its upper part in ordcrto effectprinting on the back side of th e paper th e ink-pot, take-oft, 'equa l as well' asthatof the contact rollers, without he same will be actuated from a in ress Letters Patent, is: s p

1. In a platen typographical printing machine, the combination with the general printing mechanism of an inking device, comprising paste contact rollers, a chain carrying said rollers, means for imparting a uniform rotary n'lovement around the platen of the machineto the same, asuitably arranged inking table over which said rollers are moved to he charged with ink," and a form secured below the platen intendedto be-inked by said rollers, and means for actuating the platen ofthe machine comprising two connectingrods, a crank-disc and a cairrdisc actuating said connecting rods, a crossbar pivoting around a pin on the platen, said connecting rods being pivotally connected to theends of said cross-bar, substantially as set forth.

2. In a platen typographical machine, printing mechanism including a reciprocating platen, an inking device including an end- 1'esscarrier,inking rollers carriedby said carrier, a rotatable inking table over which the rollers are moved to be charged'with ink, means for rotating inking table in a 'di: rection, opjposed'to the moven'i'entfof said endtarrier, naan f i reciprocating 'jthe platen, said means being arranged to interrupt the'norm a1 platen movement at its upper limit whereby to "p ermit tl'lje inkingrollers} to contact with the platen carried form'j during such interruptedplaten movement, and means carried on th e platen to maintain a fixed contact ofthe rollers with relation tothefjorm during the travelof the rollers overthe form."

3. In a platen typographical printing ma chine, general printing mechanism including a platen, means for reciprocating 'thejplaten arranged to provide a dwell inthe' movement of the pl ateniat' its upper position, af h'ain. carrier mounted for travel tr'aiisvers'e the plateininking rollers carriedby the chain car- .rier an'd'n' ojivabl'e in a plane'helow the'jplaten in their-operative relationTt-o the plate a cylindri'cal' jinking table su'pplyink t o d] I In. testimony whereof ,I liavel hereunto,

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